Beer, G. (2010). Technology innovation in underground construction (1a. ed.). CRC Press.
Chicago-čujuhus (17. p.)Beer, Gernot. Technology Innovation in Underground Construction. 1a. ed. Boca Ratón: CRC Press, 2010.
MLA-čujuhus (9. p.)Beer, Gernot. Technology Innovation in Underground Construction. 1a. ed. CRC Press, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.